Malicious PDF — malware analysis report

Static analysis result for SHA-256 709a207210e26084…

MALICIOUS

PDF

49.7 KB Created: 2020-10-04 08:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b12b2debad6ee6b07b628477503b3fe5 SHA-1: 70818785b36fc6060abedd6bae2b2dfddff8017c SHA-256: 709a207210e260849728f516f6ada2e0839160f22c76ecbceaeafb34fcbea8af
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=detencion+de+ranferi+torres+diaz+ali In PDF document text
    • http://jigemivex.quilcenebiblechurch.org/uploads/1/3/1/4/131483200/2375658.pdfIn PDF document text
    • http://files.portagepartnersconsulting.com/uploads/1/3/0/9/130968935/7f1492c88c.pdfIn PDF document text
    • http://files.apharreld.com/uploads/1/3/1/4/131406807/simevunebu_sujobuzigosimib_rowovopategij_tovonab.pdfIn PDF document text
    • http://powowom.foragingforbalance.com/uploads/1/3/1/8/131858540/3545616.pdfIn PDF document text
    • http://files.dallasapwu.org/uploads/1/3/0/7/130738637/jasimotunomafuwabibe.pdfIn PDF document text
    • http://ribigus.northbaytheatrics.com/uploads/1/3/1/4/131453247/7a358b0e4cd44.pdfIn PDF document text
    • http://files.antonthomasart.com/uploads/1/3/1/8/131871979/kugokuko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dae546e6-de44-4ea1-96b1-0da21a869df2/9531894628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe56484-d1fe-444e-9905-d889685d6375/bamadil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9fa32d-bf33-4030-be27-b939cfa589f3/gusanotuwojatume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6666/6407/files/gedezibofajawukuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6352/9638/files/download_hungry_shark_evo_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/wotudiwuxedowoladitetopev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5046/6464/files/72373314753.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000761e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761E 4852 bytes
SHA-256: fc3a715554ff2394e06aa6b7f222d5258fadc4acb02f884da4bbef135647b7b1
font_01_sfnt_off000086a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 11224 bytes
SHA-256: 491a71db1b9439e41729a8bd9f442cac2dd00ab0afc737ad451987b1a5e6bf32
font_02_sfnt_off0000ab5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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